Plan a flight · Mon 1:48 am EDT (05:48 UTC)

Lebanon Municipal to Washington Dulles International LEB → IAD

365 nautical miles (420 statute miles) southwest on a straight line, true course 221°, about 237° magnetic at the departure end (variation 16W). At 120 knots that is 3 h 01 min at the quickest height in today's winds (4,500 ft, a 1-knot tailwind), arriving about 4:49 am EDT (08:49 UTC), after sunset at the destination. Right now LEB is marginal VFR, wind from the north-northeast (030°) at 3 knots; IAD is IFR, wind from the north-northwest (340°) at 12 knots. For planning, not a briefing: the legal preflight briefing comes from Flight Service (1-800-WX-BRIEF) or the FAA's own tools. Airlines fly this pair: 2 flights in the DOT's last twelve reported months, the route's page.

The route the straight line, the warnings crossed, restrictions, pilot reports and the airports along the way · click a mark for its words

Green, blue, red and purple airport dots are the flying conditions reported there now (VFR, marginal VFR, IFR, low IFR); grey means no report. Red areas are SIGMETs, orange areas AIRMETs, hatched red areas temporary flight restrictions. Map tiles: OpenFreeMap, data © OpenStreetMap contributors.

Warnings the route crosses SIGMETs and AIRMETs whose area the line passes through or comes within 25 nm of

SIGMET E19E: thunderstorms (a convective SIGMET) up to 43,000 ft, moving from the southwest at 20 knots, until 2:55 am EDT (06:55 UTC). Over the last 118 nm of the route.

as issued

WSUS31 KKCI 120455
MKCE WST 120455
CONVECTIVE SIGMET 19E
VALID UNTIL 0655Z
CT NY NJ PA DE MD VA DC WV AND DE NJ NY MD CT VA CSTL WTRS
FROM 20NNW HTO-70SSE HTO-90SE SIE-20WNW LYH-40ESE AIR-20NNW HTO
AREA EMBD TS MOV FROM 24020KT. TOPS TO FL430.

AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the whole route.
AIRMET ZULU 1C: moderate icing up to 22,000 ft. Over the first 89 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the whole route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 167 nm of the route.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 10,000 ft. Near the route, 59 nm along the route.

A SIGMET warns of weather hazardous to all aircraft; an AIRMET of weather that matters to small aircraft and to flying without instruments. "From 60 to 180 nm out" is measured along the route from LEB.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

UAL330 at 35,000 ft, 45 nm southeast, 12:30 am EDT (04:30 UTC): moderate turbulence, wind 235° at 92 knots. At the departure end, 45 nm southeast of the line.
as filed, and in English
```
ARP UAL330 4257N 07145W 0430 F350 235/092KT TB MOD TURB CONT MOD CHOP IC
```
Report
a routine report filed through ARP
B38M at 20,000 ft, 20 nm west, 11:11 pm EDT (03:11 UTC): moderate clear-air turbulence from 20,000 ft to 25,000 ft. At the destination end, 20 nm west of the line.
as filed, and in English
```
IAD UA /OV AML300020/TM 0311/FL200/TP B38M/TB MOD CAT 200-250
```
Report
a routine report filed through IAD
Where
20 nm northwest (300°) of AML
Time
03:11 UTC
Height
at 20,000 ft
Aircraft
B38M
Turbulence
moderate clear-air turbulence from 20,000 ft to 25,000 ft
GA6C descending, 20 nm southeast, 12:32 am EDT (04:32 UTC): overcast above 1,000 ft, remarks: bases OVC010. 148 nm along the route, 20 nm southeast of the line.
as filed, and in English
```
SWF UA /OV SWF 270005/TM 0432/FLDURD/TP GA6C/SK OVC010/RM BASES OVC010
```
Report
a routine report filed through SWF
Where
5 nm west (270°) of SWF
Time
04:32 UTC
Height
during the descent
Aircraft
GA6C
Sky
overcast from 1,000 ft
Remarks
bases OVC010
E145 at 600 ft, 21 nm northwest, 11:20 pm EDT (03:20 UTC): overcast above 600 ft. 286 nm along the route, 21 nm northwest of the line.
as filed, and in English
```
MDT UA /OV MDT/TM 0320/FL006/TP E145/SK OVC 006
```
Report
a routine report filed through MDT
Where
over MDT
Time
03:20 UTC
Height
at 600 ft
Aircraft
E145
Sky
overcast from 600 ft
B712 descending, 21 nm southeast, 11:10 pm EDT (03:10 UTC): remarks: light rain light chop bases 50,000 ft ft. 335 nm along the route, 21 nm southeast of the line.
as filed, and in English
```
BWI UA /OV RWY 15R/TM 0310/FLDURD/TP B712/RM LIGHT RAIN. LIGHT CHOP. BASES 500 FT
```
Report
a routine report filed through BWI
Where
runway 15R
Time
03:10 UTC
Height
during the descent
Aircraft
B712
Remarks
light rain light chop bases 50,000 ft ft

Winds aloft along the route, and the time en route the forecast for use 02:00–09:00 UTC · at 120 knots true airspeed

The westbound cruising heights for this course (VFR: even thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 4 forecast points nearest it (ALB, AVP, PSB, RIC). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
4,500 ft	340° at 3 kt	−1 kt	13 °C	121 kt	3 h 01 min	4:49 am EDT (08:49 UTC)
6,500 ft	320° at 9 kt	−1 kt	10 °C	121 kt	3 h 01 min	4:49 am EDT (08:49 UTC)
8,500 ft	290° at 10 kt	+4 kt	8 °C	116 kt	3 h 09 min	4:57 am EDT (08:57 UTC)
10,500 ft	270° at 11 kt	+7 kt	5 °C	113 kt	3 h 14 min	5:02 am EDT (09:02 UTC)
12,500 ft	260° at 14 kt	+10 kt	2 °C	110 kt	3 h 19 min	5:07 am EDT (09:07 UTC)
14,500 ft	260° at 19 kt	+14 kt	-3 °C	106 kt	3 h 27 min	5:15 am EDT (09:15 UTC)
16,500 ft	260° at 24 kt	+18 kt	-7 °C	102 kt	3 h 35 min	5:23 am EDT (09:23 UTC)
18,000 ft FL180	260° at 27 kt	+21 kt	-10 °C	99 kt	3 h 41 min	5:29 am EDT (09:29 UTC)
24,000 ft FL240	240° at 35 kt	+32 kt	-22 °C	88 kt	4 h 09 min	5:57 am EDT (09:57 UTC)
30,000 ft FL300	240° at 52 kt	+48 kt	-35 °C	72 kt	5 h 04 min	6:52 am EDT (10:52 UTC)
34,000 ft FL340	240° at 62 kt	+59 kt	-41 °C	61 kt	5 h 59 min	7:47 am EDT (11:47 UTC)
39,000 ft FL390	240° at 58 kt	+54 kt	-49 °C	66 kt	5 h 32 min	7:20 am EDT (11:20 UTC)

Based on data from the 12th at 00:00 UTC; valid on the 12th at 06:00 UTC for use 02:00 to 09:00 UTC; temperatures above 24,000 ft are below zero. Heights are above sea level; a height is left out when the forecast has no wind for it over most of the line (the ground is higher). Ground speed is the airspeed less the headwind; the time en route is for the straight line and ignores climb, descent and routing around weather.

The forecast points as issued

Point	From	3,000	6,000	9,000	12,000	18,000	24,000	30,000	34,000	39,000
ALB	used from 0 nm out; 60 nm from the line	120/9	270/8 10°	L/V 5°	260/9 1°	260/34 -10°	250/42 -22°	240/57 -35°	240/70 -42°	240/65 -50°
AVP	used from 148 nm out; 41 nm from the line	150/5	350/13 12°	270/20 8°	260/17 4°	260/25 -11°	240/31 -22°	240/54 -35°	230/61 -41°	240/55 -49°
PSB	used from 296 nm out; 99 nm from the line		360/13 13°	330/14 7°	300/11 3°	290/12 -11°	240/23 -23°	270/25 -36°	250/34 -40°	250/45 -48°
RIC	used from 345 nm out; 94 nm from the line	270/23	280/19 11°	270/18 8°	240/22 4°	230/39 -7°	220/55 -18°	220/75 -30°	230/83 -39°	230/64 -50°

The weather now: both ends and the airports along the way public airports with a weather report within 25 nm of the line, one for each stretch

Airport	Where	Conditions	Wind	Visibility	Ceiling	Elevation	Reported
LEB Lebanon, NH	departure	marginal VFR Sky: a broken layer at 2,100 feet, overcast at 3,500 feet Weather: light rain	from the north-northeast (030°) at 3 knots	9 mi	2,100 ft	603 ft	1:28 am EDT (05:28 UTC)
VSF Springfield, VT	20 nm out, 4 nm southeast of the line	marginal VFR Sky: scattered clouds at 300 feet, overcast at 1,800 feet	calm	10+ mi	1,800 ft	577 ft	05:22 UTC
ALB Albany, NY	79 nm out, 16 nm northwest of the line, tower	IFR Sky: a broken layer at 600 feet, overcast at 1,400 feet Weather: light drizzle, mist	from the north (360°) at 5 knots	6 mi	600 ft	284 ft	04:51 UTC
GBR Great Barrington, MA	99 nm out, 20 nm southeast of the line	no report just now				739 ft
SWF New York, NY	148 nm out, 23 nm southeast of the line, tower	marginal VFR Sky: scattered clouds at 700 feet, overcast at 1,200 feet Weather: mist	from the north-northeast (030°) at 7 knots	6 mi	1,200 ft	490 ft	04:45 UTC
FWN Sussex, NJ	177 nm out, 17 nm southeast of the line	IFR Sky: a broken layer at 800 feet, overcast at 2,400 feet	from the north-northeast (030°) at 9 knots	10+ mi	800 ft	421 ft	04:53 UTC
ABE Allentown, PA	227 nm out, 9 nm southeast of the line, tower	marginal VFR Sky: a few clouds at 1,200 feet, overcast at 2,000 feet	from the east-northeast (060°) at 9 knots	10+ mi	2,000 ft	393 ft	04:51 UTC
LNS Lancaster, PA	276 nm out, 1 nm northwest of the line, tower	IFR Sky: a broken layer at 600 feet, overcast at 1,900 feet	from the northeast (050°) at 10 knots	10+ mi	600 ft	402 ft	04:53 UTC
MDT Harrisburg, PA	286 nm out, 21 nm northwest of the line, tower	marginal VFR Sky: overcast at 1,000 feet	variable at 3 knots	10+ mi	1,000 ft	310 ft	05:08 UTC
FDK Frederick, MD	335 nm out, 15 nm west of the line, tower	IFR Sky: overcast at 800 feet Weather: light rain	from the north (010°) at 8 knots	10+ mi	800 ft	308 ft	05:35 UTC
IAD Washington, DC	destination	IFR Sky: overcast at 600 feet Weather: light rain, mist	from the north-northwest (340°) at 12 knots	4 mi	600 ft	312 ft	12:52 am EDT (04:52 UTC)

The highest airport on this list sits at 739 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At IAD when you get there the forecast at the estimated arrival, 4:49 am EDT (08:49 UTC)

Wind from the north-northwest at 12 knots, visibility 5 miles, light rain, mist, overcast at 600 feet IFR

The whole forecast for IAD

From Mon 2:00 am EDT (06:00 UTC): wind from the north-northwest at 12 knots, visibility 5 miles, light rain, mist, overcast at 600 feet
From Mon 8:00 am EDT (12:00 UTC): wind from the north-northwest at 10 knots, gusting to 18, visibility more than 6 miles, overcast at 1,000 feet
From Mon 12:00 pm EDT (16:00 UTC): wind from the north-northwest at 13 knots, gusting to 21, visibility more than 6 miles, scattered clouds at 1,500 feet, overcast at 2,500 feet
From Mon 2:00 pm EDT (18:00 UTC): wind from the north-northwest at 11 knots, gusting to 18, visibility more than 6 miles, scattered clouds at 2,500 feet, overcast at 3,500 feet
From Mon 5:00 pm EDT (21:00 UTC): wind from the northwest at 7 knots, visibility more than 6 miles, a broken layer at 3,500 feet
From Mon 8:00 pm EDT (00:00 UTC): wind from the west-northwest at 3 knots, visibility more than 6 miles, scattered clouds at 4,000 feet

The forecast for LEB, the departure

From Mon 2:00 am EDT (06:00 UTC): wind from the north at 3 knots, visibility more than 6 miles, light rain, a few clouds at 2,000 feet, overcast at 3,500 feet
From Mon 6:00 am EDT (10:00 UTC): wind calm, visibility 5 miles, mist, a broken layer at 800 feet
From Mon 9:00 am EDT (13:00 UTC): wind from the northwest at 5 knots, visibility more than 6 miles, scattered clouds at 5,000 feet
From Mon 11:00 pm EDT (03:00 UTC): wind calm, visibility 3 miles, mist, a broken layer at 1,500 feet

Temporary flight restrictions on the line or within 25 nm of it

6/8800 Baltimore, MD, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 17 nm from the route, 325 nm along the route · drones kept away from a public gathering · starts Saturday 17 October · ZDC
4/9383 WASHINGTON, DC., USA 4 nm from the route, at the destination end · security · ZDC
6/8600 Sterling, VA, Monday, October 12, 2026 through Monday, October 12, 2026 Local on the route, at the destination end · a VIP movement · today · ZDC

Daylight

Sunset at LEB 6:11 pm EDT (22:11 UTC), at IAD 6:36 pm EDT (22:36 UTC) (civil twilight ends 7:02 pm EDT (23:02 UTC)). At 120 knots the arrival at IAD is before sunrise there (7:16 am EDT (11:16 UTC)).

Each restriction opens the FAA's own page with the exact area, heights and times. Ordinary notices to air missions (closed runways, lights out) are not shown: the FAA's notice search is not open to sites like this one at this time.

Radar and forecast charts for the regions crossed government pictures, the latest each time the page loads

Radar now, the Northeast · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

Sources: the Aviation Weather Center's data service (SIGMETs, AIRMETs, graphical AIRMETs, pilot reports, winds and temperatures aloft, observations and terminal forecasts), the National Weather Service radar, the Weather Prediction Center's charts, the FAA's temporary flight restriction list and shapes, and the FAA's airport file for the positions, elevations and magnetic variation. Fetched when the page is viewed and kept a few minutes. Each leg is the straight line between its two airports; airways, terrain and airspace are not considered. The airports in detail: Lebanon Municipal, Washington Dulles International.